- ./backup-script --help | fgrep 'Usage: ' >/dev/null
- ./backup-script --help | fgrep 'Configuration file is "' >/dev/null
- ./backup-status --help | fgrep 'Usage: ' >/dev/null
- ./backup-audit --help | fgrep 'Usage: ' >/dev/null
+ ./backup-script --help 2>&1 | grep -F 'Usage: ' >/dev/null
+ ./backup-script --help 2>&1 | grep -F 'Configuration file is "' >/dev/null
+ ./backup-status --help | grep -F 'Usage: ' >/dev/null
+ ./backup-audit --help | grep -F 'Usage: ' >/dev/null